There are 19 6-letter words that start with 'os'.
| oscine | oscula | oscule | osetra | osiers |
| osmics | osmium | osmole | osmols | osmose |
| osmous | osmund | osprey | ossein | ossify |
| osteal | ostium | ostler | ostomy | |
Note: These 19 6-letter words that start with 'os' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ost, osm, osc, oss, ose, osi, osn, osp, osa.
3-letter words start with 'os' (1)